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3dfc40898c
The `__future__` we relied on is now, where the 3 specific things are all included [since Python 3.0](https://docs.python.org/3/library/__future__.html): * absolute_import * print_function * unicode_literals * division These import statements are no-ops and are no longer necessary.
136 lines
3.9 KiB
Python
136 lines
3.9 KiB
Python
# This source file is part of the Swift.org open source project
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#
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# Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
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# Licensed under Apache License v2.0 with Runtime Library Exception
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#
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# See https://swift.org/LICENSE.txt for license information
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# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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"""
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Temporary module with functionality used to migrate away from build-script-impl.
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"""
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import itertools
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import subprocess
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from swift_build_support.swift_build_support.targets import \
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StdlibDeploymentTarget
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__all__ = [
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'UnknownSDKError',
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'check_impl_args',
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'migrate_swift_sdks',
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'parse_args',
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]
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# -----------------------------------------------------------------------------
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class UnknownSDKError(Exception):
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"""Error indicating an unknown SDK was encountered when migrating to target
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triples.
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"""
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def __init__(self, sdk):
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self.sdk = sdk
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super(UnknownSDKError, self).__init__(
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'Unknown SDK: {}'.format(self.sdk))
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def migrate_swift_sdks(args):
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"""Migrate usages of the now deprecated `--swift-sdks` option to the new
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`--stdlib-deployment-targets` option, converting Swift SDKs to the
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corresponding targets.
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This function is a stop-gap to replacing all instances of `--swift-sdks`.
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"""
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def _flatten(iterable):
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return itertools.chain.from_iterable(iterable)
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def _swift_sdk_to_stdlib_targets(sdk):
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targets = StdlibDeploymentTarget.get_migrated_targets_for_sdk(sdk)
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if targets is None:
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raise UnknownSDKError(sdk)
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return targets
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def _migrate_swift_sdks_arg(arg):
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if not arg.startswith('--swift-sdks'):
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return arg
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sdks = arg.split('=')[1]
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sdk_list = [] if sdks == '' else sdks.split(';')
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targets = _flatten(map(_swift_sdk_to_stdlib_targets, sdk_list))
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target_names = [target.name for target in targets]
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return '--stdlib-deployment-targets={}'.format(' '.join(target_names))
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return list(map(_migrate_swift_sdks_arg, args))
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# -----------------------------------------------------------------------------
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def _process_disambiguation_arguments(args, unknown_args):
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"""These arguments are only listed in the driver arguments to stop argparse
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from auto expanding arguments like --install-swift to the known argument
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--install-swiftevolve. Remove them from args and add them to unknown_args
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again.
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"""
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if hasattr(args, 'impl_skip_test_swift'):
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if args.impl_skip_test_swift:
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unknown_args.append('--skip-test-swift')
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del args.impl_skip_test_swift
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if hasattr(args, 'impl_install_swift'):
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if args.impl_install_swift:
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unknown_args.append('--install-swift')
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del args.impl_install_swift
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return args, unknown_args
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def parse_args(parser, args, namespace=None):
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"""Parses a given argument list with the given argparse.ArgumentParser.
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Return a processed arguments object. Any unknown arguments are stored in
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`build_script_impl_args` attribute as a list. Ignores '--' to be compatible
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with old style argument list.
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"""
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args = [arg for arg in args if arg != '--']
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args, unknown_args = parser.parse_known_args(args, namespace)
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args, unknown_args = _process_disambiguation_arguments(args, unknown_args)
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args.build_script_impl_args = unknown_args
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return args
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# -----------------------------------------------------------------------------
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def check_impl_args(build_script_impl, args):
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"""Check whether given argv are all known arguments for
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`build-script-impl`.
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Raises a ValueError if any invalid argument is found. Return nothing
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otherwise.
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"""
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pipe = subprocess.Popen(
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[build_script_impl, '--check-args-only=1'] + args,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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_, err = pipe.communicate()
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if pipe.returncode != 0:
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raise ValueError(str(err.splitlines()[0].decode()))
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